Explanation Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor.  Explanation The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earth's surface. Explanation The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion. Explanation Earth is closest to the sun every year in early January , when it's winter for the Northern Hemisphere. Earth is farthest away from the sun in early July, during our Northern Hemisphere summer. Explanation Scotsman John Dunlop developed the first practical pneumatic tire in 1888 . Explanation Max Karl Ernst Ludwig Planck, was a German theoretical physicist whose discovery of energy quanta won him the Nobel Prize in Physics in 1918 . Explanation Quebec is a province of Canada. Explanation Qatar is located in west Asia. قطر مغربی ایشیا کا ایک اہم ملک ہے۔ Explanation Seven Mile Beach is a long crescent of coral-sand beach on the western end of Grand Cayman island.  Explanation Falchion is a  broad, slightly curved sword with the cutting edge on the convex side.

Explanation Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor.  Explanation The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earth's surface. Explanation The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion. Explanation Earth is closest to the sun every year in early January , when it's winter for the Northern Hemisphere. Earth is farthest away from the sun in early July, during our Northern Hemisphere summer. Explanation Scotsman John Dunlop developed the first practical pneumatic tire in 1888 . Explanation Max Karl Ernst Ludwig Planck, was a German theoretical physicist whose discovery of energy quanta won him the Nobel Prize in Physics in 1918 . Explanation Quebec is a province of Canada. Explanation Qatar is located in west Asia. قطر مغربی ایشیا کا ایک اہم ملک ہے۔ Explanation Seven Mile Beach is a long crescent of coral-sand beach on the western end of Grand Cayman island.  Explanation Falchion is a  broad, slightly curved sword with the cutting edge on the convex side.

Explanation Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor.  Explanation The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earth's surface. Explanation The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion. Explanation Earth is closest to the sun every year in early January , when it's winter for the Northern Hemisphere. Earth is farthest away from the sun in early July, during our Northern Hemisphere summer. Explanation Scotsman John Dunlop developed the first practical pneumatic tire in 1888 . Explanation Max Karl Ernst Ludwig Planck, was a German theoretical physicist whose discovery of energy quanta won him the Nobel Prize in Physics in 1918 . Explanation Quebec is a province of Canada. Explanation Qatar is located in west Asia. قطر مغربی ایشیا کا ایک اہم ملک ہے۔ Explanation Seven Mile Beach is a long crescent of coral-sand beach on the western end of Grand Cayman island.  Explanation Falchion is a  broad, slightly curved sword with the cutting edge on the convex side.

Explanation Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor.

Explanation The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earth's surface.

Explanation The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion.

Explanation The wavelength of a transverse wave is the distance between two adjacent crests or troughs. It is a fundamental property of waves and is typically denoted by the symbol λ (lambda).

Explanation Transverse waves are waves where the particles of the medium oscillate perpendicular to the direction of wave propagation, creating crests and troughs. Examples include light waves, radio waves, and water waves.

Explanation When a sound wave travels from one place to another , it transports energy from the source of the sound to the surrounding environment. Sound waves are a form of mechanical energy that is transferred through the vibration of particles in a medium, such as air or water.

Explanation If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black . This is because no light is being reflected , and our eyes perceive the absence of light as black. When an object reflects all the  component colors of light, it appears  white .